emacs 30 ssh: couldn't find a proper `ls' command

Hi, I've recently started using emacs 30 which I compile from source. Something that broke in the switch from emacs 29->30 is I am not able to use tramp to ssh into any of my guix servers. I get this error

```

Debugger entered--Lisp error: (file-error "Couldn't find a proper `ls' command")

```

I reported this as an Emacs bug - 72861 - and based on the data I provided -- full backtrace, etc. -- they indicated it was a guix bug. They pointed me to guix bug 64534.

However, I tried adding the appropriate directory to tramp-remote-path (/run/current-system/profile/bin) and that did not work.

If I switch back to 29.4 then I can access my servers again normally through tramp.

Here is my system information:

```

christopher@theoden

-------------------

OS: Guix System x86_64

Host: OptiPlex 9020 00

Kernel: 5.15.161-gnu

Uptime: 63 days, 19 hours, 14 mins

Packages: 167 (guix-system), 251 (guix-user)

Shell: bash 5.1.16

Resolution: 1920x1080

DE: GNOME

Theme: Adwaita [GTK2/3]

Icons: Adwaita [GTK2/3]

Terminal: guix

CPU: Intel i5-4570 (4) @ 3.600GHz

GPU: AMD ATI Radeon HD 8490 / R5 235X OEM

GPU: Intel HD Graphics

Memory: 5038MiB / 15914MiB

```

``` guix describe

Generation 143 Sep 03 2024 10:14:51 (current)

guix 82174b2

repository URL: https://git.savannah.gnu.org/git/guix.git

branch: master

commit: 82174b2742c2a59fd7959ba9acc80edd6f93d9f7

```

The emacs version I am testing is:

GNU Emacs 30.0.90 (build 5, x86_64-pc-linux-gnu, GTK+ Version 3.24.41, cairo version 1.18.0) of 2024-09-03

--

📛 Christopher Howard

🚀 gemini://gem.librehacker.com

🌐 http://gem.librehacker.com

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